344 CHEMISTRY: KEYES AND WINNINGHOFF 
TABLE 1 
Observed and Calculated Values of the Equivalent Conductance 
103 C. 
Nal in Isoamyl Alcohol 
NHd in Isoamyl Alcohol 
Nal in Propyl Alcohol 
A obs. 
A calc. 
% diflf. 
A obs. 
A calc. 
% diff. 
A obs. 
A calc. 
% diff. 
A f\C\ 
7.79 
7.92 
20.10 
U.U5 
7.182 
7.194 
+0.17 
7.396 
7.476 
+ 1.08 
(20.11) 
A 1 A 
6.636 
6.658 
+0.33 
7.032 
7.105 
+ 1.04 
19.65 
19.53 
-0.61 
A OA 
6.115 
6.142 
+0.43 
6.256 
6.352 
+ 1.54 
19.17 
19.13 
-0.21 
A /I A 
U.4(J 
5.307 
5.335 
+0.53 
5.464 
5.598 
+2.46 
18.42 
18.49 
+0.38 
A OA 
4.451 
4.460 
+0.20 
4.672 
4.794 
+2.62 
17.38 
17.56 
+ 1.03 
1 AA 
1 .UU 
4.184 
4.183 
-0.03 
. 4.408 
4.552 
+3.03 
17.00 
17.21 
+ 1.24 
0 A 
3.394 
3.374 
—0.61 
3.588 
3.663 
+2.23 
15.73 
-1-1 00 
5.0 
2.560 
2.534 
-1.02 
2.656 
2.676 
+0.75 
13.62 
13.56 
-0.44 
10.0 
2.024 
1.995 
-1.43 
2.168 
2.164 
-0.19 
12.04 
11.80 
-1.99 
20.0 
1.649 
1.635 
-0.69 
1.776 
1.763 
-0.73 
10.44 
10.31 
-1.25 
40.0 
1.408 
1.404 
-0.28 
1.448 
1.456 
+0.55 
8.90 
8.82 
-0.90 
100 
1.294 
1.290 
-0.31 
1.336 
1.339 
+0.22 
7.33 
7.26 
-0.95 
150 
1.312 
1.309 
+0.023 
1.332 
1.335 
+0.22 
6.85 
6.79 
-0.88 
200 
1.339 
1.336 
-0.22 
300 
1.393 
1.400 
+0.50 
400 
1.413 
1.459 
+3.20 
500 
1.396 
error between the concentrations 0.00005 and 0.0004 normal. At the 
latter concentration the correction term D{cy)^ in the Kraus equation 
amounts to only 3.5% of the mass-action constant K in the case of 
sodium iodide in isoamyl alcohol. 
A full description of this work will appear in the June number of the 
Journal of the American Chemical Society. 
This investigation was carried out with the aid of a grant made to 
Prof. A. A. Noyes by the Carnegie Institution of Washington, for which 
we wish to express our great indebtedness. We also wish to thank Prof. 
C. A. Kraus and Prof. A. A. Noyes for many helpful suggestions. 
1 Kraus and Bray, J. Amer. Chem. Soc, 35, 1354, 1384 (1913). 
2 Arrhenius, Meddelandenfr. K. Vetenskapakademiens Nohel-Institut, 2, No. 42, 10 (1913). 
3 Kraus and Bray, Loc. cit., p. 1319. 
4 Dutoit and Duperthuis, /. chim. phys., 6, 699 (1908). 
